Re: [PATCH v4 2/6] media: create a macro to get entity ID

[Hans Verkuil <hverkuil@xs4all.nl>]

On 08/14/2015 04:56 PM, Mauro Carvalho Chehab wrote:
> Instead of accessing direcly entity.id, let's create a macro,

s/direcly/directly/

> as this field will be moved into a common struct later on.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

Regards,

	Hans

> 
> diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> index 7b39440192d6..b9382f06044a 100644
> --- a/drivers/media/media-device.c
> +++ b/drivers/media/media-device.c
> @@ -75,8 +75,8 @@ static struct media_entity *find_entity(struct media_device *mdev, u32 id)
>  	spin_lock(&mdev->lock);
>  
>  	media_device_for_each_entity(entity, mdev) {
> -		if ((entity->id = id && !next) ||
> -		    (entity->id > id && next)) {
> +		if (((entity_id(entity) = id) && !next) ||
> +		    ((entity_id(entity) > id) && next)) {
>  			spin_unlock(&mdev->lock);
>  			return entity;
>  		}
> @@ -102,7 +102,7 @@ static long media_device_enum_entities(struct media_device *mdev,
>  	if (ent = NULL)
>  		return -EINVAL;
>  
> -	u_ent.id = ent->id;
> +	u_ent.id = entity_id(ent);
>  	if (ent->name)
>  		strlcpy(u_ent.name, ent->name, sizeof(u_ent.name));
>  	u_ent.type = ent->type;
> @@ -120,7 +120,7 @@ static long media_device_enum_entities(struct media_device *mdev,
>  static void media_device_kpad_to_upad(const struct media_pad *kpad,
>  				      struct media_pad_desc *upad)
>  {
> -	upad->entity = kpad->entity->id;
> +	upad->entity = entity_id(kpad->entity);
>  	upad->index = kpad->index;
>  	upad->flags = kpad->flags;
>  }
> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> index 78440c7aad94..b8102bda664d 100644
> --- a/drivers/media/media-entity.c
> +++ b/drivers/media/media-entity.c
> @@ -141,10 +141,10 @@ void media_entity_graph_walk_start(struct media_entity_graph *graph,
>  	graph->stack[graph->top].entity = NULL;
>  	bitmap_zero(graph->entities, MEDIA_ENTITY_ENUM_MAX_ID);
>  
> -	if (WARN_ON(entity->id >= MEDIA_ENTITY_ENUM_MAX_ID))
> +	if (WARN_ON(entity_id(entity) >= MEDIA_ENTITY_ENUM_MAX_ID))
>  		return;
>  
> -	__set_bit(entity->id, graph->entities);
> +	__set_bit(entity_id(entity), graph->entities);
>  	stack_push(graph, entity);
>  }
>  EXPORT_SYMBOL_GPL(media_entity_graph_walk_start);
> @@ -185,11 +185,11 @@ media_entity_graph_walk_next(struct media_entity_graph *graph)
>  
>  		/* Get the entity in the other end of the link . */
>  		next = media_entity_other(entity, link);
> -		if (WARN_ON(next->id >= MEDIA_ENTITY_ENUM_MAX_ID))
> +		if (WARN_ON(entity_id(next) >= MEDIA_ENTITY_ENUM_MAX_ID))
>  			return NULL;
>  
>  		/* Has the entity already been visited? */
> -		if (__test_and_set_bit(next->id, graph->entities)) {
> +		if (__test_and_set_bit(entity_id(next), graph->entities)) {
>  			link_top(graph)++;
>  			continue;
>  		}
> diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
> index 17f08973f835..01bc3c48a2b4 100644
> --- a/drivers/media/platform/vsp1/vsp1_video.c
> +++ b/drivers/media/platform/vsp1/vsp1_video.c
> @@ -352,10 +352,10 @@ static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
>  			break;
>  
>  		/* Ensure the branch has no loop. */
> -		if (entities & (1 << entity->subdev.entity.id))
> +		if (entities & (1 << entity_id(&entity->subdev.entity)))
>  			return -EPIPE;
>  
> -		entities |= 1 << entity->subdev.entity.id;
> +		entities |= 1 << entity_id(&entity->subdev.entity);
>  
>  		/* UDS can't be chained. */
>  		if (entity->type = VSP1_ENTITY_UDS) {
> diff --git a/include/media/media-entity.h b/include/media/media-entity.h
> index 8b21a4d920d9..478d5cd56be9 100644
> --- a/include/media/media-entity.h
> +++ b/include/media/media-entity.h
> @@ -126,6 +126,8 @@ struct media_entity_graph {
>  	int top;
>  };
>  
> +#define entity_id(entity) ((entity)->id)
> +
>  int media_entity_init(struct media_entity *entity, u16 num_pads,
>  		struct media_pad *pads);
>  void media_entity_cleanup(struct media_entity *entity);
>